1. Black Hole is Hypothetical region in space.
2. Hydrogen is the most abundant element in the universe.
3. The earth’s rotation on its axis is from West to East.
4. In 1977, USA launched two Voyagers and in 1979 they passed Jupiter and sent back color pictures and other information about the planet and its moons.
5. Venus is the Roman goddess that was called Aphrodite in Greek.

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